SixtyPical/eg/rudiments/memloc.60p

byte foo

define chrout routine
  inputs a
  trashes a
  @ 65490

define print routine
  inputs foo
  trashes a, z, n
{
    ld a, foo
    call chrout
}

define main routine
  trashes a, y, z, n, foo
{
    ld y, 65
    st y, foo
    call print
    inc foo
    call print
}